Some current transformers include the burden resistor internally. Sometimes referred to as a "Safe CT"; they can be disconnected under load. There are also accuracy classes and a whole bunch of other parameters. But generally speaking and for your purpose none of that particularly matters.
-James Jefferson Jarvis APRS World, LLC +1-507-454-2727 http://www.aprsworld.com/ On Mon, Oct 12, 2026 at 4:36 PM William Miller <[email protected]> wrote: > Friends: > > > > I am installing my second Fortress Envy8 inverter and I am encountering > the same problem for the second time: The supplied CTs are too small to > clip around the service-entrance conductors. I contacted Fortress and they > were not much help. They said try Aim Dynamics, without specifying a > product. > > > > The CTs provided are rated at 100 Amp / 100 mA. This means they have a > 1000 to 1 ratio. Is it valid to say I could replace the provided CTS with > any CT that has the same ratio? I have found this to be true when > contemplating DC resistive shunts, like for the Outback FNDC. > > > > Thanks in advance. > > > > William Miller > > > > William Miller > > Miller Solar > > www.millersolar.com > > CA License C-10 77398 > > > _______________________________________________ > List sponsored by Redwood Alliance > > Pay optional member dues here: http://re-wrenches.org > > List Address: [email protected] > > Change listserver email address & settings: > > https://lists.re-wrenches.org/mailman/options/re-wrenches_lists.re-wrenches.org/ > > There are two list archives for searching. When one doesn't work, try the > other: > https://www.mail-archive.com/[email protected]/ > https://lists.re-wrenches.org/pipermail/re-wrenches_lists.re-wrenches.org/ > > List rules & etiquette: > http://www.re-wrenches.org/etiquette.htm > > Check out or update participant bios: > http://www.members.re-wrenches.org >
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